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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-04-25 22:31:49 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-05-16 11:09:17 +0200 |
| commit | ccf33d6880f39a35158fff66db13000ae4943fac (patch) | |
| tree | a39cb95e64c412b107c8640ae521bda78a7d1033 /kernel/time/tick-common.c | |
| parent | clockevents: Move the tick_notify() switch case to clockevents_notify() (diff) | |
| download | linux-ccf33d6880f39a35158fff66db13000ae4943fac.tar.xz linux-ccf33d6880f39a35158fff66db13000ae4943fac.zip | |
clockevents: Add module refcount
We want to be able to remove clockevent modules as well. Add a
refcount so we don't remove a module with an active clock event
device.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130425143436.307435149@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-common.c')
| -rw-r--r-- | kernel/time/tick-common.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index 84c7cfca4d7d..433a1e11d13b 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -18,6 +18,7 @@ #include <linux/percpu.h> #include <linux/profile.h> #include <linux/sched.h> +#include <linux/module.h> #include <asm/irq_regs.h> @@ -257,6 +258,9 @@ void tick_check_new_device(struct clock_event_device *newdev) goto out_bc; } + if (!try_module_get(newdev->owner)) + return; + /* * Replace the eventually existing device by the new * device. If the current device is the broadcast device, do |